BUSlink USB 3.0 PCI Express Card allows you to upgrade your current computer system to take advantage of 4.8 Gbit/s data transfer speed offered by USB 3.0. It is an upgrade to USB 2.0 not only in data transfer speed, but also in its ability to power up more powerful devices straight off the SuperSpeed bus. BUSlink USB 3.0 PCI Express Card is also backward compatible with USB 2.0 and USB 1.1, thus ensuring all your current USB peripherals will not be left out in the cold gathering dust. It is also a perfect companion to Buslink USB 3.0 External Hard Drives.